Combination-valve.



W; B. DAVIS.

COMBINATION VALVE. APPLICATION FILED MAR. 22, 1910.

Patented Dec 20,1910.

WALTER B. DAVIS, CF AURORA, ILLINOIS.

COMBINATION-VALVE.

To all whom it may concern:

Be it known that I. YALTER B. Dxvis, a citizen of the United States,residing at Aurora, in the county of Kane and State of Illinois. haveinvented certain new and useful Improvements in @ombination-Valves; and:1 do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to valves, particularly to an improved combinationcheck and globe valve intended to take the place of these two scparatevalves where they are used together in connecting up the pipes of steamand hot water boilers and heating systems. My combination valve may alsobe used to advantage in connecting water feed pipes with boilers.

The uses my invention are many. but it is more particularly des ned forsteam boilers and steam heating systems, especially for connectingradiators or heating coils to the return pipes. also on the feed pipesof boilers. In both of these places, as well. as in many others, a checkvalve and a globe or gate valve are now commonly and prop-- erly used.The check valve is to prevent the How of water from going back into thera diators when the steam is shutoii' at the inlet to said radiators. asis ordinarily the case. In the feed pipes of boilers, the check valve isused to prevent the water or steam pressure in the boiler from backingup into the mains or the return heating pipes connected thereto. in bothof the locations referred to, the globe valve is placed close to thecheck valve and normally left open, said globe valve being placedbetween the check valve and the boiler or the return pipe, as

the case may be. The two valves are placed in this relative position inorder that the globe valve may be used when it is necessary to take thecheck valve apart for the purpose of removing scale or to repair it whenit fails to close automatically. This check valve frequently gets out oforder because even tiny bits of scale or dirt will hold them open, andthey are, therefore, not to be depended upon when taking apart the pipesleading up to the check valve. The globe valves are consequently used asa precaution to prevent steam fitters from being scalded by water orsteam backing up Specification or Letters Patent.

Application filed March 22, 1910.

Patented Dec. 2%, 1910.

Serial No. 550,870.

through an inoperative check valve. Said globe valves are also usefulfor regulating the flow of water to the boiler, etc.

The object of my invention is to combine these two valves in one wherebythe space which itoccupies is reduced to about onethird of that requiredby the two valves and their connection. My valve can, therefore, be usedin numerous places where there is not suficient space for the twovalves. It may also be noted that the cost of manufacture of my valve isno greater than the ordinary globe valve so that the use of my inventionwill cut the expense in half as compared with the use of twoseparatevalves for securing the same advantages.

The invention consists in the features of construction and combinationsof parts hereinafter described and specified in the claims.

In the accompanying drawing: Figure 1 is a central vertical sectionthrough a valve, constructed in accordance with my inven tion, and 2 isa sectional view on the line 0-0J of Fig. 1.

The body 1 of the valve is similar to the regular globe or check valve,having the usual partition containing the valve seat The valve disk 4 isprovided with a plurality of downwardly projecting fingers 5 which passthrough the opening in the partition and serve to guide the disksquarely over said opening to insure the perfect seating or tightclosing of the valve. Said valve disk is also provided with a pluralityof upwardly projecting fingers 6 which also serve as guides but areprincipally designed to act as abutments for a radially projecting lug 7on the end of the valve stem 8. There is no other connection between thevalve disk and valve stem except this lug which engages the upwardlyextending fingers 6 when the valve stem is turned. The result of thisconnection is that the valve disk is made to turn with the valve stemwhenever the latter is screwed up or down. The disk is, therefore, freeto act as a perfect check valve when the valve stem is raised. hen,however, said valve stem is turned down, it forces the disk firmly downinto its seat and acts just like a globe valve. T he turning of the diskwith the valve stem, as the latter is screwed down, grinds out anyparticles of scale or dirt that may have collected on the valve seatand, in case said disk adheres or becomes fixed to its seat, the turningof the valve will free it as the valve stem is screwed up.

While l have illustrated my invention as applied to an ordinary one-wayvalve casing, it should be understood that it may be applied to any ofthe other common forms, such as cross-valves, anglewalves and Y- valves.1 also do not limit myself to the details of construction herein shownand described but reserve the right to make such changes therein as mayfairly fall within the scope of the appended claims.

1 claim:

1. The combination, with a valve casing having a partition thereinprovided with the valve opening ot a valve stem having screw connectionwith the casing and adapted to move longitudinally in line with saidvalve opening, a valve made separate from said valve stem and arrangedin said opening, said valve being free to act a check valve when thevalve stem is screwed outward, but also acting as a stop valve when saidvalve stem is screwed inward so as to hold said valve firmly in itsopening, fingers arranged on said valve and extending along the lowerend of said ,valve stem, and a radial projection on said valve stemarranged between said fingers on the valve for the purpose specified.

2. The combination. with a valve casing having a partition thereinprovided with the valve opening, of a valve stem having screw connectionwith the casing and adapted to move longitudinally in line with saidvalve opening, a separate valve arranged in said opening, said valvebeing free to act as a check valve when the valve stem is screwedoutward but also acting as a stop valve when said valve stem is screwedinward so as to hold said valve firmly in its opening, guide fingersarranged at intervals around the periphery of said valve and extendingupwardly around the lower end oi said valve stem, and aradial projectionon said valve stem arranged between two of said upwardly extendingfingers on the valve for the purpose specified.

3. The combination, with a valve casing having a partition thereinprovided with the valve opening, of a valve stem having screw connectionwith the casing and adaptcd to move longitudinally in line with saidvalve opening, a separate valve arranged in said opening, said valvebeing free to act as a check valve when the valve stem is screwedoutward but also acting as a stop valve when said valve stem is screwedinward so as to hold said valve firmly in its opening, downwardlyextending guide fingers on said valve, guide lingers arranged atintervals around the periphery of said mlve and extending upwardlyaround the lower end of said valve stem, and a radial projection on saidvalve stem arranged between two of said upwardly extending fingers onthe valve for the purpose specified.

In testimony whereof, I atlix my signature in presence of two witnesses.

VALTER B. DAVIS. lVitnesses H. J. Coornn, R. H. RonrNsoN.

